package demo1;

public  class Test1 {
    protected int a = 10;
    protected int b = 20;

    public static void main(String[] args) {
        Test1 test1 = new Test1();
        System.out.println(test1.a);
    }
}
class Student{

}
class Teacher{

}
class School{
    public Student[] students;
    public Teacher[] teachers;
}